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Jun 15

Guide: Piles of Stones (OS Maps)

Pile of stones below Yoadcastle

On every late-Victorian and early-20th-century OS sheet the surveyors marked any conspicuous heap of stones they could not instantly classify as a tumulus, beacon, trig-point or boundary stone with the catch-all term “Pile of Stones.”

Jun 07

Guide: SAR Doppler Tomography

a close up of a red and white pattern on a white background

Synthetic-aperture radar (SAR) already relies on Doppler shifts: echoes from scatterers in a side-looking radar beam have slightly different frequencies as the platform flies past, and focusing those micro-shifts yields a two-dimensional image.

Jun 05

Guide: Classification of Henge Monuments

Avebury Landscape

Archaeologists use the word “henge” for later-Neolithic and earliest Bronze-Age earthen rings whose ditch lies inside the bank, creating a deliberately bounded interior. The term itself was coined in 1932 by Kendrick; it was refined in the 1950s by Richard Atkinson, whose system still frames most discussion.

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